1) Airtight explanations 2) Blame deflectors 3) Certain pleas 4) Columbo heard a lot of them 5) Common defenses 6) Cops check them out 7) Courtroom defenses 8) Courtroom explanations 9) Courtroom vouchers 10) Cover stories 11) Covers 12) Crime stories 13) Detectives check them 14) Detectives hear a lot of them 1) Cover stories 2) Outs